In a medium bowl, combine the Brie and the dressing; mix to coat. Slice the bread in half horizontally. Hollow out the bottom half, leaving a 3/4-inch shell. Spread the Brie mixture on the bottom. Top with the lettuce leaves, cucumber slices, cheese slices, raspberries, strawberries, and pecans. Replace the top of the bread; secure with long wooden picks. Slice into individual servings. Serve immediately, or pack the ingredients into containers to assemble later.